The boy likes eating apples? This is not right.
They don't tell us that the family's hobby is apple growing either. The fact that it is the boy holding the apples represents something else.
The correct answer is that it tells us that the family has a fruitful future. The apples tell us that the family hoped to grow in the future. The boy is the eldest son. He would become the head of the family on his father's death and would inherit the family wealth.